He said that there are three kinds of evil in the world: moral evil, physical evil, and metaphysical evil. Moral evil is what we call sin. Physical evil includes disease or calamities caused by natural events—what we call “acts of God.” Metaphysical evil, Leibniz said, meant that to be finite is to be metaphysically imperfect, because only that which is infinite can be metaphysically perfect. Anything that is created is, by nature, finite.
